Marine reservoir corrections: St. Helena, South Atlantic Ocean

Lewis, C.A. and Reimer, P.J. and Reimer, R.W. (2008) Marine reservoir corrections: St. Helena, South Atlantic Ocean. Radiocarbon, 50 (2). pp. 275-280. ISSN 0033-8222

[img]
Preview
Text
St-Helena.pdf

3563Kb

Official URL: http://digitalcommons.library.arizona.edu/holdings...

Abstract

We present the first marine reservoir age and ∆R determination for the island of St. Helena using marine mollusk radiocarbon dates obtained from an historical context of known age. This represents the first marine reservoir age and ∆R determination in the southern Atlantic Ocean within thousands of kilometers of the island. The depletion of 14C in the shells indicates a rather larger reservoir age for that portion of the surface Atlantic than models indicate. The implication is that upwelling old water along the Namibian coast is transported for a considerable distance, although it is likely to be variable on a decadal timescale. An artilleryman’s button, together with other artifacts found in a midden, demonstrate association of the mollusk shells with a narrow historic period of AD 1815–1835.

Item Type:Article
Additional Information:An erratum appeared in Radiocarbon Vol. 50 (3) December 2008, p. 471. It is appended at the end of this article
Uncontrolled Keywords:St Helena; St. Helena; Saint Helena; radiocarbons; radiocarbon dating; radiocarbon dates; marine reservoir age; reservoir effect; surface ocean; reservoir ages; marine mollusks; mollusks; shells; foraminifera; middens; midden deposits; Patella caerulea; limpets; lime; limestone; St. Helena Artillery; southeastern Atlantic; southern Atlantic Ocean; Atlantic; upwelling; currents; Banks Valley; Namibia
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Geography
ID Code:1070
Deposited By:INVALID USER
Deposited On:28 Aug 2008
Last Modified:06 Jan 2012 16:19
377 full-text download(s) since 28 Aug 2008
53 full-text download(s) in the past 12 months
More statistics...

Repository Staff Only: item control page